Robert Vernor Hammack, Jr. (January 22, 1922 Brookston, Texas – March 28, 1990 Riverside, California) was an American musician, originally from Texas, whose principal instrument was jazz piano. He led a prolific career in Los Angeles as a pianist, organist, conductor, arranger, and composer in (i) live venues, (ii) broadcast studios for radio and television, and (iii) recording studios for records, radio, television, and film. Hammack flourished in a wide spectrum of genres that included dixieland, Blues, swing, sweet dance music (e.g., Lawrence Welk), easy listening, gospel, liturgical jazz, musical theatre, Tin Pan Alley, classical, and film score.